Vibration molding machine



Sept. 22, 1953 E. MEZGER VIBRATION MOLDING MACHINE Filed Jan. 10, 1950 2 Sheets-Sheet 1 IN VEN TOR.

BY 532V 2 Sheets-Sheet 2 INVENTOR. fid wfid 6] .P l I I 1 l l I l E. MEZGER VIBRATION MOLDING MACHINE Sept. 22, 1953 Filed Jan.

Patented Sept. 22, 1953 VIBRATION MOLDING MACHINE Eduard Mezger, Kallnach, Switzerland Application January 10, 1950, Serial No. 137,802 In Switzerland January 17, 1949 2 Claims.

The present invention relates to a vibration moulding machine of the type wherein a vibrating and pressing device is arranged at one end of a horizontal axle which is journalled .fcr being rotated about itself and for being moved relative to the base of the machine in a vertical direction, the said vibrating and pressing device resting on the said base during vibrating and pressing and being lifted off said base by the vertical movement of said horizontal axle so as to clear the said base when being reversed by rotating the said horizontal axle 180.

The invention has the principal object of providing a twin vibration moulding machine of the kind referred to allowing independent operation of each of the two vibrating and pressing devices.

It is another main object of the invention to provide a method of operating a twin vibration moulding machine of the kind referred to in which each of the two vibrating and pressing devices is vibrated for the period required by the mould attached to it.

It is a further object of the invention to pro= vide a method of simultaneously preparing the complementary parts of a mould box on a twin vibration moulding machine of the kind referred to.

Other objects of the invention will appear from the description of a typicalembodiment of a twin vibration moulding machine later in this specification.

With these general statements of the objects and purposes of my invention I will now proceed to describe an embodiment thereof and the manner in which my invention is carried out, and it will be understood that while I have described what may be considered as a preferable embodiment of my invention, I do not limit myself to the precise conditions or proportions herein set forth, as they may be varied by those skilled in the art in accordance with the particular purposes for which they are intended and the conditions under which they are utilized.

In the accompanying drawings:

Fig. 1 shows a front elevation of a typical embodiment of a twin vibration moulding machine according to the invention.

Fig. 2, a plan view thereto.

Fig. 3, a section along the longitudinal center line of Fig. 2 on a larger scale.

Fig. 4 is a fragmentary sectional view of a detail of the structure.

In a box shaped upright l of the machine an axle 2 (Fig. 3) is rotatably journalled; on that front end of the axle 2, which projects from the upright l of the machine, a casing is attached by means of screws 4, and the rear portion 3 of the casing contains a cylindrical guide arranged perpendicular to the axle 2. The front portion of this casing, which is attached to said rear portion 3, and which projects forward and laterally, forms the casings 5 and 6 of two press cylinders (not shown in the drawings) which are independent of one another. The press pistons of these press cylinders in each of which a vibrator device (likewise omitted from the drawing) is arranged coaxially, act each on a table plate 5 and 3, respectively, which are designed for receiving the pattern plates and mould box parts. The control members for these two vibration devices and for the two press cylinders are housed in a chamber 9 (Fig. 3) arranged between the casings 5 and 6 of the press cylinders, and on its front wall the operating members associated therewith are arranged. In the guide arranged in the portion 3 of the said casing, perpendicular to the axle 2 a cylindrical hollow beam I0 is axially shiftable; on that part of this beam which pro jects beyond the portion 3, a two armed cantilever H is arranged rotatably but restrained from being shifted axially with respect to the beam [6. On each of the two arms of this cantilever H a press plate 12 and I3, respectively, is attached. On the end of the beam Ill which is lying in the portion 3, a gudgeon pin M is journalled (Fig. l) which is engaged by a connecting rod [5 which is pivoted on the crank pin IE of a crank ll journalled to the portion 3 of the casing, as shown in Fig. l. Crank pin it is further engaged by a piston rod l8 on the end of which a piston !9 is arranged which is shiftable in a cylinder 26 under the action of a pressure medium, such as oil. The cylinderzll is tiltably pivoted on an axle 2| in the said lower portion of this part of the casing. The control members for the pressure medium for moving the piston is in the cylinder 26 are likewise arranged in the lower portion of this part of the casing, and their operating members are arranged on the front wall thereof.

For the purpose of filling in the sand into the parts of a moulding box attached on the table plates 7 and 8 and for the vibrating thereof the vibration moulding machine described is in the position shown in the drawing: the cantilever l I with its two arms carrying the press plates l2 and it may then be in the position indicated in chain-dotted lines in Fig. After the vibrating, the sand contained in the parts of the mould box has yet to be pressed, since its uppermost layer has still not sufiiciently solidified by the 8 irom the parts of .torand-press device.

3 mere vibrating. For this purpose the table plates 'l' and 8 with the pattern plates and parts of the mould box arranged on them are lifted up by means of the press cylinders and are forced against the press plates l2 and I3 of the cantilever which has been turned into the position shown in Fig. 2 of the drawing in full lines. The beam is on which the cantilever H is pivoted, is then in the position shown inFi 3. Theposition of the press plates 52 and 13 during the pressing is fixed so that the crank pin I6 has passed its dead centre by a slight margin, while the piston [9 in the cylinder ,is .in .an end position. After the pressing, reversing is effected for the purpose of lifting oil the .parts of the mould box from the pattern plates, i..e. theaxle 2 with all the components carried by it is turned 180 by means of a reversing gear 22 arranged on its rear end. The lifting-off of the pattern attached to the table plates 8 and 1e mold box which now on the press plates iii and i3 is effected by ng the beam it in its guide in the par 3y the aid of the piston is, in the cylinder 2t, hrough the piston i8, the crank pin E5 of the connecting rod l5. -In 1e return strore of the press pistons press cylinders arranged in the casings 5 and G can be used for increasing the amount of draw, if desired.

It is-oi great advantage, if during the vibrating and the pressing the-vibratorand press-devices rest on a rigid and --solid base, which must not however hamper, the reversing of the vibra- In th vibration moulding machine represented, this is achieved in the .ioliowing manner:

The box shaped upright i of the machine is constructed in two parts and has a bottom portion l which is rigidly arranged on a base 23,

and an upper portion 2 which is tiltable about a horizontal. axle 2 t 'journalled at the rear of is part I perpendicular to theJhorizont-al axle 2. 'In the front part of thebox shapedupright i of the machine a lifting cylinder $5 is arranged which rests with a cylindrical bearing surface, and is ed, on a bracket 28 on the part i".

i the li' cylinder a piston is 'r'hiftable under the action of a pressure medium, the piston rod of which has ahead piece .38 with a seniioylindrical bearing surface. This head piece '30 acts on an angle bracket provided in the position com ressive forces only are transmitted.

The two casings i3 and have at their bottom legs and M, respectively, for which twosupporting brackets 25% and are arranged on the base plate During vibrating and pressing, the legs 33 and 3d of the casings 5 and i3 rest firmly on the supporting brackets 35 and 35. For the purpose of reversing, the upper part i" of the upright of the machine is rocked about the axle together with the axle 2 journalled therein by means of the liitingcylinder whereby the legs 33 and 3d are lifted off their supporting brackets 35 and 36 to such anextent that the latter do no longer hamperthe reversin The part l" of the casing, instead of being tilta'ol-e about the axle 25, could alternatively be vertically shiitable-in a guide, or an eccentric lifting device could be provided by means of which the axle 2 could be lifted with all parts carried by it.

What I claim as my invention and desire to secure by Letters Patent, is:

1. A vibration molding machine comprising, in combination, a base member for the entire machine; a pair of casings resting on said base member; a pair of vibration and pressure tables movably mounted respectively in said casings, so

that said tables are entirely separate from each other and are independently operable; an elongated hollow cylindrical guide member located between said casings and connected thereto, said guide member having a first axis which extends -in a direction which is substantially perpendicular to said tables; an elongated cylindrical slide member slidably mounted within said cylindrical guide member and being substantially longer than said cylindrical guide member so that an end portion of said slide member extends beyond said cylindrical guide member at an :end portion or said cylindrical guide member which ismost distant from said tables; a pair of pressure plates respectively overlying said tables and mounted in substantially parallel relation thereto, said pressure plates being adapted to coinpress the sand in molds prepared on said tables when said'tables are moved toward said pressure plates; a cylindrical support member connected to said pressure plates, mounted for rotation about said end portion of said cylindrical slide member and resting on said end portion of said c lindrical guide member, whereby said pressure plates may be rotated about said slide member J to move them from overlying relation with respect to tables to permit the mold to be freely prepared on said tables; support means connected to said casing and supporting the same for rotation about a second normal to said first axis; means for raising said cylindrical guide member above said base member in order to permit said tables and pressure plates to be rotated through about said second axis without contact between said casings and base member; means for rotating said casings,

tables and pressure plates about said second axis; and means for moving cylindrical slide member in said cylindrical guide member so as to move said pressure plates away from said tables so as to permit the completed mold to be removed from the machine, said means for moving said cylindrical slide member comprising a pivotally mounted hydraulic cylinder and pis ton assembly located in a housing mounted between said casings and a linkage means interconnecting said piston and cylindrical slide memher, said linkage means comprising a connecting rod pivotally connected at one end to said cylindrical slide member and pivotally connected at its other end to said piston.

2. A vibration molding machine comprising, combination, a base member for the entire ma chine; a pair of casings resting on said base member; a pair of vibration and pressure tables movabl mounted respectively in said casings, so that said tables are entirely separate from each other and are independently operable; an elongated hollow cylindrical guide member located between said casings and connected thereto, said guide member having a first axis which extends; in a direction which is substantially perpendicular to said tables; an elongated cylin-- drical. slide member slidably mounted within said cylindrical guide member and being substantially longer "than said cylindricalguide member so that an end portion of said slide member extends beyond said cylindrical guide member at the end portion of said cylindrical guide member which is most distant from said tables; a pair of pressure plates respectively overlying said tables and mounted in substantially parallel relation thereto, said pressure plates being adapted to compress the sand in molds prepared on said tables when said tables are moved towards said pressure plates; a cylindrical support member connected to said pressure plates, mounted for rotation about said end portion of said cylindrical slide member and resting on said end portion of said cylindrical guide member, whereby said pressure plates may be rotated about said slide member to move them from overlying relation with respect to said tables to permit the mold to be freely prepared on said tables; support means connected to said casing and supporting the same for rotation about a second axis normal to said first axis; means for raising said cylindrical guide member above said base member in order to permit said tables and pressure plates to be rotated through 180 about said second axis without contact between said casings and base member; means for rotating said casings tables and pressure plates about said second axis; and means for moving said cylindrical slide member in said cylindrical guide member so as to move said pressure plates away from said tables so as to permit the completed mold to be removed from the machine, said means for moving said cylindrical slide member comprising a pivotally mounted hydraulic cylinder and piston assembly located in a housing mounted between said casings and a linkage means interconnecting said piston and cylindrical slide member, said linkage means comprising a connecting rod pivotally connected at one end to said cylindrical slide member and pivotally connected at its other end to said piston and a crank member pivotally connected at one portion thereof to said cylindrical guide member and pivotally connected at another portion thereof to said piston in such a way that said crank member is located just beyond dead center when said piston is at the end of one of its strokes, whereby the cylindrical slide member is locked in the position where said cylindrical support resting on said cylindrical guide member until said piston is removed from the end of its stroke.

EDUARD MEZGER.

References Cited in the file of this patent UNITED STATES PA'IENTS Number Name Date 1,447,300 Grimes Mar. 6, 1923 1,910,354 Nicholls May 23, 1933 2,111,564 Lawlor Mar. 22, 1938 2,156,523 Campbell May 2, 1939 2,169,279 Oyster Aug. 15, 1939 2,309,271 Osbrink Jan. 26, 1943 2,438,218 Johnston Mar. 23, 1948 FOREIGN PATENTS Number Country Date 683,479 Germany Nov. 9, 1939 

